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Share-based Payments, Restricted Stock or Restricted Stock Units (Details) - Restricted Stock [Member]
 12 Months Ended
Mar. 31, 2016
USD ($)
Installment
$ / shares
shares
Mar. 31, 2015
USD ($)
$ / shares
shares
Number of Shares [Roll Forward]    
Non-vested at beginning of period (in shares) 181,443  
Granted (in shares) 49,702 95,645
Vested (in shares) (75,519)  
Cancelled (in shares) (2,099)  
Non-vested at end of period (in shares) 153,527 181,443
Weighted Average Grant Date Fair Value [Roll Forward]    
Non-vested at beginning of period (in dollars per share) | $ / shares $ 16.84  
Granted (in dollars per share) | $ / shares 31.50  
Vested (in dollars per share) | $ / shares 15.34  
Cancelled (in dollars per share) | $ / shares 20.05  
Non-vested at end of period (in dollars per share) | $ / shares $ 22.28 $ 16.84
Total unrecognized compensation expense, restricted stock | $ $ 2,346,000  
Number of equal annual installments in which awards vest | Installment 3  
Number of shares withheld (in shares) 29,003 27,183
Estimated fair value of awards granted | $ $ 1,566,000 $ 2,316,000
Term and vesting period 1 year 6 months